The Warpie known as Peeping Tom gained his powers when he was effected by a reality warp created by Mad Jim Jaspers when he attempted to take over Great Britain. Somehow, Peeping Tom was not discovered by the agents of the R.C.X. and needed to be "rescued" from his family.
All of the Parasites were trained by Uncle Lex to use their powers to become petty thieves and to obey him blindly, which the children did without question. Since Uncle Lex didn't value the children under his care, he taught them to not really care about each other as well.
While using his power to see all things, Peeping Tom saw the Cherubim were nearby, so he and his fellow Parasite, Spasm, went out to meet them and bring them to their home, the Den. There the Cherubim found a new home and started to settle in. 
Later, when a jewelry heist went bad, Snap became scared and teleported blindly and was struck by a city bus, killing him. Snap's death upset the Cherubim, especially Fern, who were all still mourning the recent death of Cherub Whirlwind. 
When they returned to the Den, Fern confronted Uncle Lex and the Cherubim decided to leave them and find a new home. However, Uncle Lex had other ideas and wouldn't let them and set the Parasites against the Cherubim. Peeping Tom faced Lump, but Lump overpowered Peeping Tom by manifesting a creature he saw into this reality. Luckily Giggles was able to banish the creature back to it's home.
It is unknown the fate of Peeping Tom after that. However, it is certain that he did loose his powers as did most of the other Warpies on Otherworld.